吡啶-2-甲醛酰腙镉配合物的合成、晶体结构与荧光性质

合成了3个不同结构的吡啶?2?甲醛缩对氯苯氧乙酰腙(HL)与镉的配合物。通过X射线单晶衍射、红外光谱、紫外光谱、荧光光谱以及热重等分析,对其进行晶体结构和性质的研究。单晶衍射结构解析表明:配合物1属单斜晶系,C2/c空间群,是一个通过氯离子桥联的二聚体,分子式为Cd(HL)Cl2]2;配合物2属单斜晶系,P21/c空间群,是一个含2个有机配体、蝴蝶状的单核分子,其分子式为Cd(HL)2Br2];配合物3属三斜晶系,P1空间群,配合物中只含有一个有机配体,其分子式为Cd(HL)I2]。固体荧光分析表明:配体和配合物均有很强的荧光性,且发绿光。

Synthesis, Crystal Structure and Fluorescence Properties of Cadmium Complexes of Pyridine-2-formaldehyde Hydrazone

Three complexes,Cd(HL)Cl2]2(1),Cd(HL)2Br2](2)andCd(HL)I2](3)(HL=2?(4?chlorophenoxy)?N′?(pyridin?2?ylmethylene)acetohydrazide),were synthesized using a common solution method.The crystal structure and properties were studied by X?ray single crystal diffraction,infrared spectrum,ultraviolet spectrum,fluorescence spectrum and thermogravimetric analysis.The analysis of single crystal diffraction structure shows that complex 1 belongs to monoclinic system,C2/c space group,and is a dimer bridged by chlorine ions.Complex 2 belongs to monoclinic system,P21/c space group.It is a butterfly shaped mononuclear molecule containing two organic ligands.The central Cd^2+ions of complexes 1 and 2 are in a distorted octahedral position.Complex 3 belongs to triclinic system,P1 space group,in which there is only one organic ligand.The coordination polyhedron of Cd^2+ion of complex 3 is distorted trigonal bipyramid.Solid fluorescence analysis showed that both ligand and complexes had strong fluorescence and emitted green light.CCDC:2011521,1;2011522,2;2011523,3.